Dual‐Stimuli‐Responsive Photoluminescence of Enantiomeric Two‐Dimensional Lead Halide Perovskites

• Published in: Advanced optical materials Vol. 9; no. 23
• Main Authors: Gao, Fei‐Fei, Li, Xiang, Qin, Yan, Li, Zhi‐Gang, Guo, Tian‐Meng, Zhang, Zhuo‐Zhen, Su, Guo‐Dong, Jiang, Chongyun, Azeem, Muhammad, Li, Wei, Wu, Xiang, Bu, Xian‐He
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 01.12.2021
• Subjects: chiral; dual‐stimuli‐responsive; First principles; Lead compounds; Materials science; Metal halides; Optical properties; Optics; Perovskites; Photoluminescence; piezochromism; Pressure effects; Stimuli; Structural analysis; Thermal expansion; thermochromism; two‐dimensional lead halide perovskites
• ISSN: 2195-1071; 2195-1071
• DOI: 10.1002/adom.202100003

2D hybrid organic–inorganic perovskites (HOIPs) are highly responsive to external stimuli and therefore have application potential as sensing materials. Though their optical properties upon singular thermal or pressure stimulation have been recently investigated, their dual‐stimuli‐responsive behaviors have not yet been explored. Here, the dual‐stimuli‐responsive luminescence of a pair of new enantiomeric 2D Dion–Jacobson HOIPs, R+[(4‐aminophenyl)ethylamine]PbI4 and S‐[(4‐aminophenyl)ethylamine]PbI4, is reported. The photoluminescence results show that their 485 nm emissions can be red‐shifted by ≈6 nm upon heating, and further increased to 529 nm under pressure. Such dual‐stimuli‐responsive emissions expand their Commission Internationale de L'Eclairage coordinates successively from (0.140, 0.272) to (0.283, 0.473). Detailed structural analysis and first principles calculations reveal that the temperature‐ and pressure‐responsive behaviors arise from the predominant electron–phonon interactions over thermal expansion effect and pressure‐induced in‐plane PbI bond contraction, respectively. The findings open up a new pathway to successively tune the optical emission of 2D HOIPs via a dual‐stimuli‐responsive approach. The thermal‐ and pressure‐responsive photoluminescence is systematically investigated for new enantiomeric 2D Dion‐Jacobson lead iodide perovskites. Their emissions can be successively tuned via the dual‐stimuli, which leads to a continuous shift of Commission Internationale de L'Eclairage coordinates from (0.140, 0.272) to (0.283, 0.473). This work opens new possibilities to sequentially manipulate optical emissions of 2D perovskites via a dual‐stimuli‐responsive approach.